*** This bug is a duplicate of bug 1969574 ***
https://bugs.launchpad.net/bugs/1969574
We should keep using bug 1969574 since that's what's been reported on
and linked to for the past few weeks.
** This bug has been marked a duplicate of bug 1969574
[Wayland] Can not select JetBrains IntelliJ IDEA windows (including Android
Studio) with mouse in workspace
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https://bugs.launchpad.net/bugs/1971693
Title:
Alt+Tab is broken for Java (AWT/Swing) apps in Wayland session
Status in mutter package in Ubuntu:
Fix Committed
Status in mutter source package in Jammy:
In Progress
Bug description:
Impact
------
When switching to a Java UI application using Alt+Tab, very often
application's window is raised, but it doesn't get keyboard focus - it stays in
the previous application, and that application continues to process keyboard
events. When the problem occurs, hovering mouse over Java app's window gets the
focus transferred to it.
This problem only happens in Wayland session, not in X.Org session. It can be
reproduced in Ubuntu 22.04, but not in 20.04.4 version.
The problem seems to affect all Java versions - reproduced for
different OpenJDK builds (8, 11, 17, 18). It can also be observed for
Java version provided by Ubuntu's 'default-jre' package
(11.0.15+10-Ubuntu-0ubuntu0.22.04.1).
Test Case
---------
1. sudo apt install default-jre
2. Download the minimal test case app from comment #1
3. From a terminal run the app
java Downloads/JTextFieldTest.java
4. Click on the terminal window (instead of the Java app)
5. Press Alt-Tab to switch focus back to the Java app
6. Type a few characters.
The characters should show in the Java app's text field instead of in
the terminal window.
What Could Go Wrong
-------------------
See the master bug for this update at LP: #1972726
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